Design and fabrication of a smart layer module in composite laminated structures

Yang, Shih-Ming; Hung, C.-C.; Chen, K H

doi:10.1088/0964-1726/14/2/003

Cited by 43 publications

(42 citation statements)

References 20 publications

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“…In the carbon fibre plate there are three ICTSs and one wired unit for reference. The effect of embedding on the strength of composite structure is open research topics, but has been studied by Yang et al [38]. It has been found that embedding a sensor with polyimide bond does not decrease the strength of the composite structure.…”

Section: System Design (A) Methodology and Objectivesmentioning

confidence: 99%

Remote inspection system for impact damage in large composite structure

Zhong¹,

Croxford²,

Wilcox³

2015

Proc. R. Soc. A.

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A significant opportunity for reducing the weight of composite aircraft is through the development of an economically efficient method to detect barely visible or invisible impact damage sustained in service. In this paper, a structurally integrated, inert, wireless system for rapid, large-area impact damage detection in composite is demonstrated. Large-area inspection from single sensors using ultrasonic-guided waves is achieved with a baseline-subtraction technique. The wireless interface uses electromagnetic coupling between coils in the embedded sensor and inspection wand. Compact encapsulated sensor units are built and successfully embedded into composite panels at manufacture. Chirp-based excitation is used to enable single-shot measurements with high signal-torandom-noise ratio to be obtained. Signal processing to compensate for variability in inspection wand alignment is developed and shown to be necessary to obtain adequate baseline subtraction performance for damage detection. Results from sensors embedded in both glass fibre and carbon fibre-reinforced composite panels are presented. Successful detection of a 10 J impact damage in the former is demonstrated at a range of 125 mm. Quantitative extrapolation of this result suggests that the same level of impact damage would be detectable at a range of up to 1000 mm with an inspection wand alignment tolerance of 4 mm.

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Section: System Design (A) Methodology and Objectivesmentioning

confidence: 99%

Remote inspection system for impact damage in large composite structure

Zhong¹,

Croxford²,

Wilcox³

2015

Proc. R. Soc. A.

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“…When the sensor layer is embedded inside the composite structure, the effect of the layer on the structural integrity is a major concern. Extensive tests have been conducted to evaluate this effect [16][17][18]. Based on the investigation results, it can be concluded that the presence of a polyimide layer used as substrate of the layer does not noticeably affect the strength of the host composite structure, nor does it promote delamination.…”

Section: Integration Of Sensor Network With Structurementioning

confidence: 99%

Multifunctional sensor network for structural state sensing and structural health monitoring

Qing

Ikegami

Beard

et al. 2010

Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2010

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In order to take full advantages of composites and enable future composite structures to operate at their physical limits rather than limits predetermined from computational design assumptions and safety factors, there is a need to develop an embeddable sensing system to allow a structure to "feel" and "think" its structural state. In this paper, the concept of multi-modal sensing capabilities using a network of multifunctional sensors integrated with a structure has been developed. Utilizing this revolutionary concept, future structures can be designed and manufactured to provide multiple modes of information that when synthesized together can provide capabilities for intelligent sensing, environmental adaptation and multi-functionality. To demonstrate the feasibility of multi-modal sensing capabilities with built-in sensor network, one single type of piezoelectric sensor was selected to perform the measurements of dynamic strain, temperature, damage detection and impact monitoring. The uniqueness of the sensing system includes (1) Flexible, multifunctional sensor networks for integration with any type of composite structural component, (2) Scalable sensor network for monitoring of a large composite structure, (3) Reduced number of connecting wires for sensors, (4) Hybrid diagnostics with multiple sensing capabilities, (5) Sensor network self-diagnostics and self-repair for damaged sensor system.

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“…Embedding sensors into the stacking sequence of composite parts during manufacture rather than surface bonding the sensors to the structure post manufacture, brings the additional benefit of allowing each sensor to monitor the curing process of the surrounding material. The embedding of sensors inside composite materials remains an open research topic [3,4,5], however it has been shown that with careful consideration of the laminates stacking sequence and the technique used to embed the sensors, sensors can be embedded without significantly reducing the strength of composite materials [6]. In this study ultrasonic sensors were embedded into the stacking sequence of glass fibres pre-impregnated with epoxy resin (prepreg), and used to monitor the progress of cure in autoclave type manufacturing processes.…”

Section: Introductionmentioning

confidence: 99%

Monitoring cure and detecting damage in composites with inductively coupled embedded sensors

Chilles

Koutsomitopoulou

Croxford

et al. 2016

Composites Science and Technology

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General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. February 2016Abstract. This paper demonstrates the capability of embedded piezoelectric sensors to monitor the state of health throughout the lifetime of composite structures. Sensors were embedded into fibre reinforced composites and used to monitor the progress of cure during manufacture, and the subsequent damage state of the cured part. The sensors used in this work consist of a single piezoelectric transducer, which is electronically connected to an inductance coil. A probe containing two inductance coils was used to make wireless ultrasonic measurements. When the probe was placed in close proximity to an embedded sensor, the electromagnetic coupling between the coils in probe and the embedded coil, allowed electronic signals to be wirelessly transferred between the transducer and the ultrasonic processing equipment. Two different inductively coupled transducer systems (ICTS) were used to monitor cure. A ICTS which generated bulk waves monitored the cure of a thick glass fibre section, and an ICTS which generated guided elastic waves monitored the cure of a large glass fibre plate. To characterise the cure monitoring ability of each ICTS, two established cure monitoring techniques; differential scanning calorimetry (DSC) and dielectric analysis, were used to record measurements during cure. The guided wave ICTS was then used to detect barely visible impact damage (BVID), created by a 10 Joule impact at a distance of 300 mm from the sensor embedded in the large glass fibre plate.

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Design and fabrication of a smart layer module in composite laminated structures

Cited by 43 publications

References 20 publications

Remote inspection system for impact damage in large composite structure

Remote inspection system for impact damage in large composite structure

Multifunctional sensor network for structural state sensing and structural health monitoring

Monitoring cure and detecting damage in composites with inductively coupled embedded sensors

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